/* ============================================
   PlayoffPredictor - Styles
   ============================================ */

:root {
  /* Colors */
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --secondary: #64748b;
  --success: #22c55e;
  --warning: #f59e0b;
  --danger: #ef4444;

  --afc-color: #c8102e;
  --nfc-color: #003594;

  --bg-primary: #0f172a;
  --bg-secondary: #1e293b;
  --bg-tertiary: #334155;

  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;

  --border-color: #475569;

  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;

  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.3);
}

/* ============================================
   Reset & Base
   ============================================ */

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.5;
  min-height: 100vh;
}

/* ============================================
   Typography
   ============================================ */

h1, h2, h3, h4 {
  font-weight: 600;
  line-height: 1.2;
}

h1 { font-size: 2rem; }
h2 { font-size: 1.5rem; }
h3 { font-size: 1.25rem; }
h4 { font-size: 1rem; }

/* ============================================
   Header
   ============================================ */

.header {
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
  padding: var(--spacing-md) var(--spacing-lg);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-content {
  max-width: 1400px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.logo-icon {
  font-size: 1.75rem;
}

.logo-text {
  font-size: 1.25rem;
  font-weight: 700;
}

.nav {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

.nav-btn {
  background: transparent;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  font-size: 0.875rem;
  padding: var(--spacing-sm) var(--spacing-md);
  transition: color 0.2s;
}

.nav-btn:hover {
  color: var(--text-primary);
}

.auth-section {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.user-info {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  cursor: pointer;
  padding: var(--spacing-sm);
  border-radius: var(--radius-md);
  transition: background 0.2s;
}

.user-info:hover {
  background: var(--bg-tertiary);
}

.user-avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  font-size: 0.875rem;
}

.user-name {
  font-size: 0.875rem;
  font-weight: 500;
}

/* ============================================
   Buttons
   ============================================ */

.btn {
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  font-family: inherit;
  font-size: 0.875rem;
  font-weight: 500;
  padding: var(--spacing-sm) var(--spacing-md);
  transition: all 0.2s;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-xs);
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.btn-primary {
  background: var(--primary);
  color: white;
}

.btn-primary:hover:not(:disabled) {
  background: var(--primary-dark);
}

.btn-secondary {
  background: var(--bg-tertiary);
  color: var(--text-primary);
}

.btn-secondary:hover:not(:disabled) {
  background: var(--border-color);
}

.btn-full {
  width: 100%;
}

.btn-sm {
  font-size: 0.75rem;
  padding: var(--spacing-xs) var(--spacing-sm);
}

/* ============================================
   Main Content
   ============================================ */

.main {
  max-width: 1400px;
  margin: 0 auto;
  padding: var(--spacing-lg);
}

.section-title {
  margin-bottom: var(--spacing-lg);
}

/* ============================================
   Status Banner
   ============================================ */

.status-banner {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: var(--spacing-md);
  margin-bottom: var(--spacing-lg);
  display: none;
}

.status-banner.visible {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

.status-banner.warning {
  border-color: var(--warning);
  background: rgba(245, 158, 11, 0.1);
}

.status-banner.error {
  border-color: var(--danger);
  background: rgba(239, 68, 68, 0.1);
}

.status-banner.success {
  border-color: var(--success);
  background: rgba(34, 197, 94, 0.1);
}

/* ============================================
   Bracket Section
   ============================================ */

.bracket-section {
  margin-bottom: var(--spacing-xl);
}

.bracket-container {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: var(--spacing-lg);
  overflow-x: auto;
  padding: var(--spacing-md);
  background: var(--bg-secondary);
  border-radius: var(--radius-lg);
}

.conference {
  min-width: 300px;
}

.conference-title {
  text-align: center;
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-md);
  margin-bottom: var(--spacing-md);
}

.afc .conference-title {
  background: var(--afc-color);
}

.nfc .conference-title {
  background: var(--nfc-color);
}

.bracket-rounds {
  display: flex;
  gap: var(--spacing-md);
}

/* NFC on left: Wild Card -> Divisional -> Championship (left to right) */
.nfc .bracket-rounds {
  flex-direction: row;
}

/* AFC on right: Championship -> Divisional -> Wild Card (left to right, HTML already ordered) */
.afc .bracket-rounds {
  flex-direction: row;
}

.round {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.round-title {
  font-size: 0.75rem;
  text-transform: uppercase;
  color: var(--text-secondary);
  text-align: center;
  margin-bottom: var(--spacing-sm);
}

.matchup {
  background: var(--bg-tertiary);
  border-radius: var(--radius-md);
  padding: var(--spacing-xs);
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.team-slot {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.2s;
  min-height: 44px;
  background: var(--bg-secondary);
}

.team-slot:hover:not(.empty):not(.locked) {
  background: var(--bg-primary);
}

.team-slot.empty {
  cursor: default;
  opacity: 0.5;
}

.team-slot.locked {
  cursor: default;
}

.team-slot.selected {
  background: var(--primary);
}

.team-slot.correct {
  background: var(--success);
}

.team-slot.incorrect {
  background: var(--danger);
  opacity: 0.7;
}

.result-icon {
  margin-left: auto;
  font-weight: bold;
  font-size: 1rem;
}

.team-slot.correct .result-icon {
  color: #fff;
}

.team-slot.incorrect .result-icon {
  color: #fff;
}

.team-logo {
  width: 28px;
  height: 28px;
  object-fit: contain;
}

.team-info {
  flex: 1;
  min-width: 0;
}

.team-name {
  font-size: 0.875rem;
  font-weight: 500;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.team-seed {
  font-size: 0.7rem;
  color: var(--text-secondary);
}

.team-score {
  font-weight: 600;
  font-size: 0.875rem;
}

/* Super Bowl */
.super-bowl {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-width: 200px;
}

.super-bowl-title {
  text-align: center;
  margin-bottom: var(--spacing-md);
  font-size: 1rem;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.super-bowl-matchup {
  width: 100%;
  max-width: 180px;
}

.vs-badge {
  text-align: center;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-secondary);
  padding: var(--spacing-xs) 0;
}

.champion-slot {
  margin-top: var(--spacing-lg);
  text-align: center;
}

.champion-label {
  display: block;
  font-size: 0.75rem;
  text-transform: uppercase;
  color: var(--text-secondary);
  margin-bottom: var(--spacing-sm);
}

.champion-slot .team-slot {
  background: linear-gradient(135deg, #fbbf24, #f59e0b);
  min-width: 160px;
}

.champion-slot .team-slot.empty {
  background: var(--bg-tertiary);
}

/* Bracket Actions */
.bracket-actions {
  display: flex;
  justify-content: center;
  gap: var(--spacing-md);
  margin-top: var(--spacing-lg);
}

/* ============================================
   Groups Section
   ============================================ */

.groups-section {
  background: var(--bg-secondary);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
}

.groups-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-md);
}

.groups-tabs {
  display: flex;
  gap: var(--spacing-xs);
  margin-bottom: var(--spacing-md);
  border-bottom: 1px solid var(--border-color);
}

.tab-btn {
  background: transparent;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  font-size: 0.875rem;
  padding: var(--spacing-sm) var(--spacing-md);
  border-bottom: 2px solid transparent;
  transition: all 0.2s;
}

.tab-btn:hover {
  color: var(--text-primary);
}

.tab-btn.active {
  color: var(--primary);
  border-bottom-color: var(--primary);
}

.groups-list {
  display: grid;
  gap: var(--spacing-md);
}

.group-card {
  background: var(--bg-tertiary);
  border-radius: var(--radius-md);
  padding: var(--spacing-md);
  cursor: pointer;
  transition: all 0.2s;
}

.group-card:hover {
  background: var(--border-color);
}

.group-card-header {
  display: flex;
  justify-content: space-between;
  align-items: start;
  margin-bottom: var(--spacing-sm);
}

.group-name {
  font-weight: 600;
}

.group-badge {
  font-size: 0.7rem;
  padding: 2px 6px;
  border-radius: var(--radius-sm);
  background: var(--bg-secondary);
}

.group-meta {
  font-size: 0.8rem;
  color: var(--text-secondary);
  display: flex;
  gap: var(--spacing-md);
}

.empty-state {
  text-align: center;
  padding: var(--spacing-xl);
  color: var(--text-secondary);
}

/* ============================================
   Modals
   ============================================ */

.modal {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.7);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-md);
  z-index: 1000;
  opacity: 0;
  visibility: hidden;
  transition: all 0.2s;
}

.modal.open {
  opacity: 1;
  visibility: visible;
}

.modal-content {
  background: var(--bg-secondary);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  max-width: 400px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  position: relative;
}

.modal-content.modal-large {
  max-width: 600px;
}

.modal-close {
  position: absolute;
  top: var(--spacing-md);
  right: var(--spacing-md);
  background: transparent;
  border: none;
  color: var(--text-secondary);
  font-size: 1.5rem;
  cursor: pointer;
  line-height: 1;
}

.modal-close:hover {
  color: var(--text-primary);
}

.modal h2 {
  margin-bottom: var(--spacing-md);
}

.modal p {
  color: var(--text-secondary);
  margin-bottom: var(--spacing-md);
}

.modal-actions {
  display: flex;
  gap: var(--spacing-sm);
  justify-content: flex-end;
  margin-top: var(--spacing-lg);
}

/* ============================================
   Forms
   ============================================ */

.form-group {
  margin-bottom: var(--spacing-md);
}

.form-group label {
  display: block;
  font-size: 0.875rem;
  font-weight: 500;
  margin-bottom: var(--spacing-xs);
}

.form-group input[type="text"],
.form-group input[type="email"],
.form-group input[type="number"],
.form-group input[type="url"],
.form-group textarea,
.form-group select {
  width: 100%;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: var(--spacing-sm) var(--spacing-md);
  color: var(--text-primary);
  font-family: inherit;
  font-size: 0.875rem;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--primary);
}

.form-static {
  color: var(--text-secondary);
  font-size: 0.875rem;
}

.form-message {
  margin-top: var(--spacing-md);
  padding: var(--spacing-sm);
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  display: none;
}

.form-message.visible {
  display: block;
}

.form-message.success {
  background: rgba(34, 197, 94, 0.1);
  color: var(--success);
}

.form-message.error {
  background: rgba(239, 68, 68, 0.1);
  color: var(--danger);
}

.radio-group {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
}

.radio-option {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  cursor: pointer;
  font-size: 0.875rem;
}

.radio-option input {
  accent-color: var(--primary);
}

.points-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--spacing-sm);
}

.points-grid label {
  font-size: 0.75rem;
}

.points-grid input {
  width: 100%;
}

hr {
  border: none;
  border-top: 1px solid var(--border-color);
  margin: var(--spacing-lg) 0;
}

/* ============================================
   Toast Notifications
   ============================================ */

.toast-container {
  position: fixed;
  bottom: var(--spacing-lg);
  right: var(--spacing-lg);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
  z-index: 1100;
}

.toast {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: var(--spacing-md);
  min-width: 250px;
  box-shadow: var(--shadow-lg);
  animation: slideIn 0.3s ease;
}

.toast.success {
  border-color: var(--success);
}

.toast.error {
  border-color: var(--danger);
}

@keyframes slideIn {
  from {
    transform: translateX(100%);
    opacity: 0;
  }
  to {
    transform: translateX(0);
    opacity: 1;
  }
}

/* ============================================
   Leaderboard
   ============================================ */

.leaderboard {
  width: 100%;
}

.leaderboard-row {
  display: grid;
  grid-template-columns: 40px 1fr 60px;
  gap: var(--spacing-md);
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-sm);
  align-items: center;
}

.leaderboard-row:nth-child(odd) {
  background: var(--bg-tertiary);
}

.leaderboard-row.header {
  font-weight: 600;
  font-size: 0.75rem;
  text-transform: uppercase;
  color: var(--text-secondary);
  background: transparent;
}

.leaderboard-rank {
  font-weight: 600;
}

.leaderboard-rank.gold { color: #fbbf24; }
.leaderboard-rank.silver { color: #94a3b8; }
.leaderboard-rank.bronze { color: #cd7f32; }

.leaderboard-name {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.leaderboard-score {
  text-align: right;
  font-weight: 600;
}

/* ============================================
   Stats
   ============================================ */

.stats-grid {
  display: grid;
  gap: var(--spacing-lg);
}

.stats-round {
  background: var(--bg-tertiary);
  border-radius: var(--radius-md);
  padding: var(--spacing-md);
}

.stats-round-title {
  font-size: 0.875rem;
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
}

.stats-team {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-xs) 0;
}

.stats-team-logo {
  width: 24px;
  height: 24px;
}

.stats-team-name {
  flex: 1;
  font-size: 0.875rem;
}

.stats-bar {
  width: 100px;
  height: 8px;
  background: var(--bg-primary);
  border-radius: 4px;
  overflow: hidden;
}

.stats-bar-fill {
  height: 100%;
  background: var(--primary);
  transition: width 0.3s;
}

.stats-pct {
  width: 40px;
  text-align: right;
  font-size: 0.75rem;
  color: var(--text-secondary);
}

/* ============================================
   Loading States
   ============================================ */

.loading {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-xl);
}

.spinner {
  width: 32px;
  height: 32px;
  border: 3px solid var(--bg-tertiary);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* ============================================
   Responsive - Keep bow-tie shape, make scrollable
   ============================================ */

@media (max-width: 1200px) {
  .bracket-container {
    /* Keep the bow-tie grid but allow horizontal scroll */
    min-width: 900px;
  }

  .conference {
    min-width: 280px;
  }
}

@media (max-width: 768px) {
  .header-content {
    flex-wrap: wrap;
    gap: var(--spacing-sm);
  }

  .header .logo-text {
    font-size: 1rem;
  }

  .section-title {
    font-size: 1.25rem;
    text-align: center;
  }

  /* Keep bow-tie shape - scale down and scroll */
  .bracket-section {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    margin: 0 calc(-1 * var(--spacing-lg));
    padding: 0 var(--spacing-lg);
  }

  .bracket-container {
    min-width: 750px;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm);
  }

  .conference {
    min-width: 220px;
  }

  .conference-title {
    font-size: 0.85rem;
    padding: var(--spacing-xs) var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
  }

  .bracket-rounds {
    gap: var(--spacing-xs);
  }

  .round-title {
    font-size: 0.6rem;
    margin-bottom: var(--spacing-xs);
  }

  .matchup {
    padding: 2px;
  }

  .team-slot {
    padding: var(--spacing-xs) var(--spacing-sm);
    min-height: 36px;
    gap: var(--spacing-xs);
  }

  .team-logo {
    width: 20px;
    height: 20px;
  }

  .team-name {
    font-size: 0.7rem;
  }

  .team-seed {
    font-size: 0.55rem;
  }

  /* Super Bowl compact */
  .super-bowl {
    min-width: 140px;
  }

  .super-bowl-title {
    font-size: 0.8rem;
    margin-bottom: var(--spacing-sm);
  }

  .super-bowl-matchup {
    max-width: 130px;
  }

  .vs-badge {
    font-size: 0.6rem;
    padding: 2px 0;
  }

  .champion-slot {
    margin-top: var(--spacing-sm);
  }

  .champion-label {
    font-size: 0.6rem;
  }

  .champion-slot .team-slot {
    min-width: 120px;
  }

  /* Groups mobile */
  .groups-section {
    padding: var(--spacing-md);
  }

  .groups-header {
    flex-direction: column;
    gap: var(--spacing-sm);
    align-items: stretch;
  }

  .groups-header .section-title {
    margin-bottom: 0;
  }

  .groups-tabs {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }

  .tab-btn {
    white-space: nowrap;
  }

  /* Forms mobile */
  .points-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  /* Status banner mobile */
  .status-banner {
    font-size: 0.85rem;
    text-align: center;
  }

  /* Toast mobile */
  .toast-container {
    left: var(--spacing-md);
    right: var(--spacing-md);
    bottom: var(--spacing-md);
  }

  .toast {
    min-width: auto;
    width: 100%;
  }
}

/* Small mobile - even more compact */
@media (max-width: 480px) {
  .main {
    padding: var(--spacing-sm);
  }

  .bracket-section {
    margin: 0 calc(-1 * var(--spacing-sm));
    padding: 0 var(--spacing-sm);
  }

  .bracket-container {
    min-width: 680px;
    gap: 4px;
    padding: var(--spacing-xs);
  }

  .conference {
    min-width: 200px;
  }

  .conference-title {
    font-size: 0.75rem;
  }

  .round-title {
    font-size: 0.55rem;
  }

  .team-slot {
    padding: 4px 6px;
    min-height: 32px;
  }

  .team-logo {
    width: 18px;
    height: 18px;
  }

  .team-name {
    font-size: 0.65rem;
  }

  .team-seed {
    display: none;
  }

  .super-bowl {
    min-width: 120px;
  }

  .super-bowl-title {
    font-size: 0.7rem;
  }

  .super-bowl-matchup {
    max-width: 110px;
  }

  .champion-slot .team-slot {
    min-width: 100px;
  }

  .modal-content {
    padding: var(--spacing-md);
    margin: var(--spacing-sm);
    max-height: calc(100vh - 1rem);
  }

  .bracket-actions {
    flex-direction: column;
    position: sticky;
    bottom: 0;
    background: var(--bg-primary);
    padding: var(--spacing-md);
    margin: var(--spacing-md) calc(-1 * var(--spacing-sm)) 0;
    border-top: 1px solid var(--border-color);
  }

  .bracket-actions .btn {
    width: 100%;
  }

  /* Improve tap targets */
  .btn {
    min-height: 44px;
    font-size: 1rem;
  }

  .nav-btn {
    padding: var(--spacing-sm);
  }

  .user-info {
    padding: var(--spacing-xs);
  }

  .user-name {
    display: none;
  }

  .user-avatar {
    width: 36px;
    height: 36px;
  }
}